Thanks for your kind words for Wilbur.
I took him to our vet and she and others on her staff spent a good deal of time examining him. He has some areas of major bruising and he lost all of his rear tail and butt feathers. The vet gave him a shot for pain (48 hr) and he's still very somber and lethargic. My only encouragement is that he did eat some food and is not dehydrated.
I just hope he is able to get back to his usual self. I'm trying to get some young girls for him, but will, of course, need to keep them quarantined for a while.
This has and continues to be a very sad time for us.